Browse Publications Technical Papers 2002-01-0893

Experimental Analysis on Soot Formation Process In DI Diesel Combustion Chamber by Use of Optical Diagnostics 2002-01-0893

Soot formation process inside the combustion chamber of an DI diesel engine is focused as a phenomenological basic scheme by using several optical diagnostics technique for the improvement of diesel exhaust emission. We have conducted the series of optical measurement research for the clarification of combustion field in an DI diesel engine. Then, this paper is a kind of review by adding the fuel vapor properties and particle image velocimetry (PIV) analysis with focusing the soot formation process. The experiments were carried out in a small sized high-speed DI diesel engine installed with an optical access view. The spray characteristics and its flow field in 2-D field were measured by laser sheet scattering (LIS) method and PIV scheme. Fuel vapor concentration field was also detected quasi-quantitatively as 2-D distribution by laser-induced exciplex fluorescence (LIEF) method, which is based on application of the TMPD/naphthalene exciplex system, relating to soot formation (initiation) process. Here, the heterogeneity of the vapor concentration should be discussed for the soot initiation, and the 2-D distribution of soot particles in several planes in the chamber was obtained with applying a laser-induced incandescence (LII) method. Further, measurement of the flow field inside the flame after an ignition was tried to clarify the effect of turbulence properties on soot formation and oxidation processes. Then, the effects of the spray properties, the vapor concentration, flow field characteristics on the soot formation process were discussed based on the experimental date obtained by optical diagnostics.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 17% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

The Physical and Chemical Character of Diesel Particulate Emissions-Measurement Techniques and Fundamental Considerations


View Details


Number Measurements of Diesel Exhaust Particles - Influence of Dilution and Fuel Sulphur Content


View Details


New Concept of Fuel Combustion DOC


View Details